期刊
NANO RESEARCH
卷 12, 期 9, 页码 2324-2329出版社
TSINGHUA UNIV PRESS
DOI: 10.1007/s12274-019-2396-6
关键词
electrocatalyst; CO2 reduction reaction; nitrogen-doped carbon; pyridinic; Faradaic efficiency
类别
资金
- National Key Research and Development Program of China [2017YFA0206901, 2018YFA0209401]
- National Natural Science Foundation of China [21773036]
- Science and Technology Commission of Shanghai Municipality [17JC1402000, 19XD1420400]
- Innovation Program of Shanghai Municipal Education Commission [2019-01-07-00-07-E00045]
The capability of electrocatalytic reduction of carbon dioxide (CO2) using nitrogen (N)-doped carbon strongly depends on the N-doping level and their types. In this work, we developed a strategy to generate mesoporous N-doped carbon frameworks with tunable configurations and contents of N dopants, by using a secondary doping process via the treatment of N,N-dimethylformamide (DMF) solvent. The obtained mesoporous N-doped carbon (denoted as MNC-D) served as an efficient electrocatalyst for electroreduction of CO2 to CO. A high Faradaic efficiency of similar to 92% and a partial current density for CO of -6.8 mA center dot cm(-2) were achieved at a potential of -0.58 V vs. RHE. Electrochemical analyses further revealed that the active sites within the N-doped carbon catalysts were the pyridinic N and defects generated by the DMF treatment, which enhanced the activation and adsorption CO2 molecules. Our study suggests a new approach to develop efficient carbon-based catalysts for potential scalable CO2RR to fuels and chemicals.
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